Specificity
Recognizes two variants of Prekallikrein in human plasma (88kDa and 85kDa) and its activation products Kallikrein, the complexes formed by Kallikrein with its endogenous inhibitors C1 inhibitor, alpha-2-macroglobulin and antithrombin III, and 45kDa Prekallikrein/Kallikrein fragments. The epitope is located on the Prekallikrein/Kallikrein heavy chain and is involved in the interaction between Prekallikrein and Factor XIIa. Inhibits Prekallikrein activation in human and rhesus plasmas by ~60- 80% and 55%, respectively. Does not cross-react with tissue kallikrein.